B) are under pressure to show
Here's how I thought through this one...
1. What's the split? "are/pressure" vs. "have pressure"
2. Which split can I eliminate?
> Okay, you have pressure on something, not "to" or "that"
> Eliminate "have pressure" split, i.e., Eliminate A and E!
3. Out of B,C and D, which two can I definitely eliminate?
> "are pressured toward showing" -- ambiguous. Are they pressured or not? This seems to change the meaning of the sentence. Eliminate D!
> "are under the pressure of..." Hmm, are the Am. execs under a Rock?? As arashyazdiha pointed out, the way this is worded, you expect the "subject" of the sentence to come right after "of".
>> For example, Am. execs ... are are under the pressure of "the sarbanes-oxley" law.
> Okay, Eliminate C
4. Answer, by POE, is (B)
> B is a valid idiom too! "under pressure to.."