In the following question, two columns are given containing three phrases each, In the first column, the phrases are A, B, and C, and in the second column, the phrases are D, E, and F. A phrase from the first column may or may not connect with a phrase from the second column to make a grammatically and contextually correct sentence. There are five options, four of which display the sequence(s) in which the phrases can be joined to form a grammatically and contextually correct sentence. If none of the options given forms a correct sentence after combination, select 'None of these' as your answer.

Column (A)	Column (B)
(A) A prolonged depressed mood, especially in combination with other symptoms,	(D) and biology may also play a role in the development of eating disorders.
(B) Memory loss is a normal part of aging,	(E) may lead to a diagnosis of a psychiatric or medical condition which may benefit from treatment.
(C) Recently, experts have proposed that differences in brain structure	(F) but that doesn’t mean we can’t take action to slow it down a little.