Directions: Choose the set of prepositions whose meaning and sequence best fits the 3 given sentences.
1. After the burglary, the office bought a sophisticated security system as an insurance ________any such losses.
2. She put ________ a brave front at the end of the meeting.
3. Sunil decided to avail himself _________the opportunity to go to Australia for training.
(A) on
(B) of
(C) at
(D) against
(E) up
(F) with