a) But we’re in the 21st century now, the era of the genome
b) We know he’s going to say that people are the way they are partly for genetic reasons
c) So when Robert Winston informs us, at the opening of each episode of the BBC1 documentary series Child of Our Time, that we’re going to “find out what makes us who we are,”
d) During much of the 20th century, it was considered impolite and unscientific to say that genes play any role in determining people’s personalities, talents or intelligence.
a) acbd
b) dacb
c) dcba
d) dcab
The quickest clue is the ‘he’ of ‘b’ who can be none other
than ‘Robert Winston’ of ‘c’; so ‘cb’ is concomitant. This
eliminates answer choice”d”. Two of the remaining answer
choices start with’d’ and one with ‘a’. Only a glance should
tell us that ‘d’ should be the first sentence, but if you still
want to confirm then the ‘but’ of ‘a’ is in contrast with ‘d’
as ‘in the 21st century’ ‘genome’ is important as against
what it was ‘during much of the 20th century’. So ‘da’ is
concomitant. This itself gives us the answer choice “b”.