Will upvote!
question 2 (multiple choice)

a static stretch is

a) safe, because it requires a partner or machine for assistance

b) safe, because it stretches the muscle and joint without causing pain

c) unsafe, because it involves holding a position for 15-30 seconds

d) unsafe, because it uses the body's momentum to stretch the muscle

The definition of static stretches, as told by www.humankinetics.com, is "a stretch that is held in a challenging but comfortable position for a period of time, typically 15-30 seconds"

With that being said, there is no real way to determine if it is 'safe' or 'unsafe' stretch, but the best option here is option B) safe, because it stretches the muscle and joint without causing pain