one SC question

edy_25

13.    On the Great Plains, nineteenth-century settlers used mud and grass to build their homes, doing it without timber and nails.
(A) settlers used mud and grass to build their homes, doing it without
(B) settlers used mud and grass to build their homes, did it without
(C) settlers used mud and grass to build their homes, making them while not having
(D) settlers used mud and grass to build their homes, making do without
(E) settlers’ homes were built of mud and grass, making do without


Why D?

sbbi

make do是固定用法.相当于manage to do
只在SC出现过这一次.