The adjective “pleased” is commonly followed by the preposition “with” when talking about satisfaction.
👉 “pleased with something” = happy or satisfied about it
✔ Correct sentence:
The customers are quite pleased with the new product.
❌ Why others are wrong:
in → not used with “pleased” in this context
by → used when something causes a feeling (e.g., pleased by the results), but less natural here
at → incorrect usage here
