帮忙解释一下这句话的意思！

这句话是什么意思？

Jarvis' work has called into question which of the following explanatory variables for naked mole rat behavior?

最好有点上下文,不然理解可能有点偏差.

基本上的意思是这个叫Jarvis的人,他的研究成果使下列哪个针对naked mole rat 的行为进行解释的变量产生疑问.

call into question 就是质疑,也就是使...站不住脚,使说不通,使人对...产生疑问.

这句话主语是那个人的work,谓语是call into question,宾语是variables

就是对于这种rat的行为,有一些对其进行说明的变量数据(variables),问你这个人的研究成果(work)会使人对下列哪个variable产生疑问(或者说使哪个variable站不住脚了,说不通了)?

原文相关的内容是这样的 Jarvis's work has suggested that differences in growth rates may influence the length of time that an individual performs a task,regardless of its age.

Question: The passage suggests that Jarvis' work has called into question which of the following explanatory variables for naked mole rat behavior?

a.size

b.age

c.reproductive status

d.rate of growth

e.previously exhibited behavior

应该选什么？