Select the correct answer.
Read the excerpt from paragraph 38.

(38) . . . He showed her in great living pictures the functioning of the colossal gigantic machinery of the State, he tried to explain to her the working of the wheels, the multifarious transmissions, regulators and detents, unreliable pendulums and untrustworthy safety valves.

Which word could replace the phrase "colossal gigantic" and still reflect its meaning?

A.
extensive
B.
magnificent
C.
monstrous
D.
incomprehensible