An 'Assertion' $(A)$ and a 'Reason' $(R)$ are given below. Choose the correct answer from the following options.
Assertion $(A)$: Vinyl halides do not undergo nucleophilic substitution easily.
Reason $(R)$: Even though the intermediate carbocation is stabilized by loosely held $p-$ electrons,the cleavage is difficult because of strong bonding.

• A
  Both $(A)$ and $(R)$ are correct statements but $(R)$ is not the correct explanation of $(A)$
• B
  Both $(A)$ and $(R)$ are wrong statements
• C
  Both $(A)$ and $(R)$ are correct statements and $(R)$ is the correct explanation of $(A)$
• D
  $(A)$ is a correct statement but $(R)$ is a wrong statement.