In the following question, two columns are given containing three phrases each. In the first column, 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 (1)                                                                                       Column (2)

(A) Exposure to hard water has been suggested as a risk factor    (D)is global warming.

(B) One of the much common environmental issues                       (E)for eczema in childhood

(C) Sentence structures are incredibly important                             (F)to the way we communicate.