Symbiosis National Aptitude Test SNAP 2017 Paper

'Bargain for' is an idiomatic expression which means 'to expect or anticipate'. The word 'surprise' along with 'indeed' in the second clause is a clear hint that the 'outcome' was 'not expected'.
Option d is ruled out as 'not' is missing there. Options b and c are eliminated as the element of surprise at the outcome shows that the verbs 'bargain' and 'take' can neither be present nor future.