Read the sentence. Having fallen out of the nest, the bird was insensible at first, but then flew off.

To decipher the meaning of the word insensible, break the word into
A the root insens and the suffix -ible.
B the root inseni and the suffix -ble.
C the prefix in-, the root sens, and the suffix -ible.
D the prefix insen-, the root eni, and the suffix -ble.