pyq/2013/csat/33

From the above passage, sedimentary rock leads to the formation of oil deposits because:

(A) there are no saline conditions below it.

(B) it allows some dissolved oxygen to enter the dead organic matter below it.

(C) the weight of overlying sediment layers causes the production of heat.

(D) it contains the substances that catalyze the chemical reactions to change dead organisms into oil.