Which principal part of the verb is used in the following sentence?

the referee rang the bell to end the game.

a.
past

b.
present

c.
past participle

d.
present participle

Have you ever contributed to “social media outrage” (using your social media accounts to boost the anger about a contemporary issue by forwarding it, liking it, etc.) without stopping to think who might’ve originated the message or what the originator’s motives might’ve been? provide example.