Dendrochronology, the study of tree-ring records to glean information about the past, is possible because each year a tree adds a new layer of wood between the existing wood and the bark. In temperate and subpolar climates, cells added at the growing season's start are large and thin-walled, but later the new cells that develop are smaller and thick-walled; the growing season is followed by a period of dormancy. When a tree trunk is viewed in cross section, a boundary line is normally visible between the small-celled wood added at the end of the growing season in the previous year and the large-celled spring wood of the following year's growing season. The annual growth pattern appears as a series of larger and larger rings. In wet years rings are broad; during drought years they are narrow, since the trees grow less. Often, ring patterns of dead trees of different, but overlapping, ages can be correlated to provide an extended index of past climate conditions.
However, trees that grew in areas with a steady supply of groundwater show little variation in ring width from year to year; these "complacent" rings tell nothing about changes in climate. And trees in extremely dry regions may go a year or two without adding any rings, thereby introducing uncertainties into the count. Certain species sometimes add more than one ring in a single year, when growth halts temporarily and then starts again.
The passage suggests which of the following about the ring patterns of two trees that grew in the same area and that were of different, but overlapping, ages?
The rings corresponding to the overlapping years would often exhibit similar patterns.
The rings corresponding to the years in which only one of the trees was alive would not reliably indicate the climate conditions of those years.
The rings corresponding to the overlapping years would exhibit similar patterns only if the trees were of the same species.
The rings corresponding to the overlapping years could not be complacent rings.
The rings corresponding to the overlapping years would provide a more reliable index of dry climate conditions than of wet conditions.
这道题目有一定的难度，看似像一个“支持主题”类的题目，但实际上文章并没有明确说明在同一地区的不同年龄的两颗树应该有什么共同点。这个题目定位在第一段最后一句“Often, ring patterns of dead trees of different, but overlapping, ages can be correlated to provide an extended index of past climate conditions.”
E选项：年轮在湿润的条件下比干燥的条件更能可靠的反应当时的气候。这个选项可以定位在“In wet years rings are broad; during drought years they are narrow, since the trees grow less”。文中没有提到证据证明湿润气候比干燥气候更加的可靠。