求教两道修饰问题

it has been estimated that the annual cost to the united states of illiteracy in lost industrual output and tax revenues is at least $20 billion a year

Athe annual cost to the united states of illiteracy in lost industrial output and tax revenues is at least $20 billion a year

b the annual cost of illiteracy to the united states is at least $20 billion a year because of lost industrial output and tax revenues

c illiteracy costs the united states at least $20 billion ayear in lost industrial output and tax revenues

d $20 billion ayear in lost industrial output and tax revenues is the annual cost to the united states of illiteracy

e lost industrial output and tax revenues cost the united stated at least $20billion a year because of illiteracy

选c

B P ， in her book illustrations, carefully coordinating them with her narratives, capitalized on her keen observation and love of the natural world

a in her book illustrations, carefully coordinating them with her narratives

b in her book illustrations, carefully coordinating them with her narratives,BP

c in the book illustrations, which her carefully coordinated with her narratives, BP

d carefully coordinated with her narratives, BP, in her book illustrations

E BP , in her book illustrations, carefully coordinated them with her narratives and

选C

这类的题目都做的很盲目 不知道该如何来判断

顶顶