Is this a run-on sentence?
In the early 1960s, Alan and Doris Litman, a couple in Pittsburgh, invented mace (a nontoxic tear gas), after one of Doris's colleagues was mugged, the Litmans wanted to create a safe product that women could use in self-defense.
A. yes
B. no
From the given choices, choose the correct answer and respond with the letter of that choice.
Answer: A