Sentence correction

If the Metropolitan Museum of Art had not decided to display together the 34 paintings, 58 works on paper, two sculptures and sundry items including prints that have made up its Picasso collection, some truths and questions about the most important figure of 20th century Western art might not have been aired.

If the Metropolitan Museum of Art had not decided to display together the 34 paintings, 58 works on paper, two sculptures and sundry items including prints that have made up its Picasso collection

If the Metropolitan Museum of Art had not decided to display together the 34 paintings, 58 works on paper, two sculptures and sundry items including prints that make up its Picasso collection

If the Metropolitan Museum of Art would not have decided to display together the 34 paintings, 58 works on paper, two sculptures and sundry items including prints, that make up its Picasso collection

If the Metropolitan Museum of Art would not have decided to display together the 34 paintings, 58 works on paper, two sculptures and sundry items including prints that have made up its Picasso collection

If the Metropolitan Museum of Art had decided to display together the 34 paintings, 58 works on paper, two sculptures and sundry items including prints, making up its Picasso collection

OA b

I am confused... can some one help me in choosing between options B and C

Thank you,
Vivek