Read the following passage. Then, answer the question that follows.

Semiramis, the queen of Assyria in 9th century B.C.E., had a plan to conquer India. For two years she prepared for this expedition. Her prodigious army consisted of 3,000,000 foot-soldiers, 500,000 horsemen, and 100,000 chariots.

Based on the use of a list context clue, what can you infer the word prodigious means in this passage?

A seemingly average amount
Extraordinary in size and force
Less than was expected
Limited in power and performance