Which statement about rat entry holes is true?

• A. Holes at least 3/4 inch can prevent entry.
• B. Holes smaller than 1/8 inch always prevent entry.
• C. Holes at least 1/2 inch can allow entry.
• D. Any hole, regardless of size, can allow entry.

Answer: (C)

Rats can squeeze through surprisingly small openings, so the size of an opening determines whether entry is possible. About a half-inch in diameter is enough for a rat to get inside, so any hole that is at least 1/2 inch should be treated as a potential entry point and sealed properly. That makes the statement about holes at least 1/2 inch being capable of entry the true one.

Larger openings do not prevent entry; they make it easier for a rat to come in. Holes smaller than 1/8 inch aren’t a guaranteed barrier either, and saying any hole will allow entry ignores that some openings are simply too small for a rat to pass.