Answer to yesterday's problem was A.
You can solve it by:
1) Using the odd one out rule (suggesting is the only one that ISN'T a main verb)
2) Remembering that the typical sentence can only have one main verb (suggesting is not a main verb)
3) Just choosing what sounds right (lol). You'll have to read the entire sentence to realize this, though, as C definitely sounds right based on the first part of the sentence alone.