Answer:
b. True
Explanation:
The man with the measuring line in the third vision of Zechariah was actually measuring Jerusalem to know the length and breadth thereof. Which indicated it was in preparation for a building plan just like a surveyor. The angel spoke and told Zechariah met "...Jerusalem shall be inhabited as towns without walls for the multitude of men and cattle". (Zechariah 2:4 KJV)
This vision revealed the future restoration of Israel.