GMAT的N道GWD语法求解!Q1:The themes that Rita Dove explores in her

GMAT的N道GWD语法求解!
Q1:The themes that Rita Dove explores in her poetry is universal,encompassing much of the human condition while occasionally she deals with racial issues.
D.are universal,encompassing much of the human condition while occasionally dealing
E.are universal,they encompass much of the human condition,also occasionally are dealing
但是我选的是E,
Q2：
Although the restaurant company has recently added many new restaurants across the country and its sales have increased dramatically,its sales at restaurants open for more than a year have declined.
A.the restaurant company has recently added many new restaurants across the country and its sales have increased dramatically,its
C .many new restaurants have recently been opened across the country and its sales increased dramatically,the restaurant company’s
我觉得最后逗号后面的its前面应该有个衔接词吧?
Q3:
Floating in the waters of the equatorial Pacific,an array of buoys collects and transmits data on long-term interactions between the ocean and the atmosphere,interactions that affect global climate.
A.atmosphere,interactions that affect
C.atmosphere that affects
不明白C为什么不对