Is the passage of dialogue written correctly or incorrectly?

"why is the dog barking? " jenna asked impatiently.
"she might smell a stranger approaching, "grandpa answered.
"i don't see anybody from the window, " jenna said. "the dog hasn't barked this long before," she continued.
"we should check for ticks," suggested grandpa.

a. incorrectly
b. correctly

 its B. because dogs have a good sense of smell so they can smell from a far away distance 

Delegates: representatives who cast votes at a political party's national convention. binding: if a primary or caucus is “binding” that means the delegates won in that contest are legally bound to vote for a particular candidate at the parties national convention.a primary is a preliminary election used to determine a party's nominee for a specific office. the winner of the party's caucus, or primary, wins the party nomination for that state. then the delegates meet at their party's national party convention, which is a formal gathering of all party delegates from all states.