I need solve this MCQ questions

QUESTION 39 Contracts directed against the welfare of a friendly foreign state are: O a. Voidable contracts O b. Express contracts O c. Valid contracts O d. Illegal contracts QUESTION 40 If an offer was not accepted by the offeree, the contract would be: O a. Unenforceable O b. Void O c. Voidable O d. Not concluded QUESTION 41 In social agreements, the intention to conclude contracts is not presumed. ( ) O True False QUESTION 42 According to their enforceability, contracts can be classified as either express or implied. ( ) O True O False