In the excerpts “... by pitching in on other assignments …” (lines 17-18) and “ask any questions that might come up right then and there”, the verb...

In the excerpts “... by pitching in on other assignments …” (lines 17-18) and “ask any questions that might come up right then and there”, the verb phrases ‘pitching in’ and ‘come up’ mean, respectively
a) contributing to – arise
b) putting up with – drop off
c) fighting off – disappear
d) getting rid of – be forgotten
e) moving away from – be eliminated