Reading the statements carefully, we understand that the premise of these sentences is based on the ship Titanic. The statement (1) clearly begins with some questions as one can CONCLUDE this from the phrase that follows the blank :‘… near BELFAST in Northern Ireland, helps to provide answers to those questions.’

Statement (A) needs a precedent because of the use of conjunction but which is used to provide contrasting information. Keeping this point in view, the statements CA form a logical pair.

Following the same argument, ED forms a logical pair as sentence E is the cause of the effect discussed in sentence D : ‘As the White Star Line could not compete with its rival, the Cunard Line, for speed, it concentrated on building bigger and more luxurious vessels to attract the rich and famous.’

Sentence (B) can follow (A) as it (A) mentions three huge vessels which are being referred to as those huge liners in sentence (B).

As (B) gives a suitable introduction to the White Star Shipping line, it will be logical to have (B) before ED.

So, the CORRECT sequence is CABED.

The statement (6) talks about the other purpose of Titanic. Based on this context, a suitable phrase is expected in the blank.

Therefore, the first sentence in the given sequence is (C), making OPTION 5 the correct answer.