Use the sentence to answer the question.

Constructing an outdoor enclosure for cats can ease the transition from roaming freely outdoors to being confined, especially if the cat is used to coming and going as it pleases. Enclosures, sometimes called “catios”, allow cats to be outside while keeping a barrier between them in birds, rodents, and reptiles, they pray on on.
What is the effect of the word especially in the sentence?
A. It emphasizes an important idea.
B. It introduced a new idea
C. It Highlight and contrast between two ideas.
D. it shows that the author is about to give an example

C. It highlights and contrasts between two ideas.