Answer :
"Anthony and his friends planned on going to the park after lunch; but they decided to play video games instead", the semicolon used correctly in this sentence.
Answer: B
Explanation
Semicolons are used to join 2 independent clauses of close relation to generate a simple sentence with appropriate meaning.
It marks for more iteration than the use of coma.
Semicolons avoid the uses of conjunction so as the sentence doesn't seem bulky.
The word comes next to the semicolon starts with small letters commonly.
the answer would be B.
you can tell because a semicolon doesn't come after something randomly. when you put a semicolon it is when you start to list something as, here is an example. i like; apples, peaches, and all types of fruit really