In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.

When it (1)______ to witnessing wars, famines or disease outbreaks on the news, guilt may (2)______ us to volunteer or donate money. Watching the generosity of other people (3)______ play an active role in helping others is also guilt-provoking, which can (4)______ turn activate us to take similar (5)______ thus paying forward.