Saurajm
BigNasty
Hey,
IMO,
meaning of the sentence - Architectural problem becomes increasingly problematic with the increase in the size of the space.
'Size of the space' - This phrase will give us a 3-2 split. Size can increase or decrease. This eliminates 'A' and 'E'
a) size of the space gets larger -> usage of word 'larger' warrants for a comparison, which the sentence does not make.
b) Correct
c) size of the space will increase - awkward construction
d) as there is an increase - awkward
e) cannot associate larger with a size without making a comparison.
Hope this helps.

Yes, but in answer B the word larger disappears, therefore the use of more to make a parallel comparison is not necessary.... I still think IMO is A.
Hi,
Space cant get larger.... Space increases
I hope this is more clear from the below definition (Citation :
https://dictionary.reference.com/browse/larger?s=t)
" large [lahrj] Show IPA adjective, larg·er, larg·est, noun, adverb
adjective
1.of more than average size, quantity, degree, etc.; exceeding that which is common to a kind or class; big; great: a large house; a large number; in large measure; to a large extent.
2.on a great scale: a large producer of kitchen equipment.
3.of great scope or range; extensive; broad.
4.grand or pompous: a man given to large, bombastic talk.
5.(of a map, model, etc.) representing the features of the original with features of its own that are relatively large so that great detail may be shown. "
Hope this helps