Acall to take part of a contest or duel?

This call should be a challenge. You can challenge someone which means you're asking the person whether or not they could do something that you've done, or if they can engage you in a fight, either verbally or physically. Challenges are particularly popular now in the internet era with everyone making challenges for anything like the ice bucket challenge or the mannequin challenge.

They looked like staggered steps mark me brainliest

D. by limiting the types of goods produced.