- A that it was essential that things they portrayed must have every relevant featureĀ· shown as clearly as possible
- B it was essential for things they portray to have had every relevant feature shown as clearly as possible,
- C it was essential that the things they portrayed had every relevant feature shown as clearly as possible,
- D that when they portrayed things, it should have every relevant feature shown as clearly as possible
The tense in choices (a) and (b) is not consistent. Moreover, choice (a) uses both 'essential' and 'must'. Thus rendering either one of these words redundant. In choice (d) 'things' the plural form cannot take it'.