Okay, so when we're dealing with propositions, they can only be evaluated <em />as <em>true </em>or <em>false. </em>So, which statement can be true, or false?
The answer is A: She set sail on Tuesday. This statement is a proposition. The statements in B and D are interrogative sentences. The statement in C is a greeting. A proposition is a statement or a suggestion offered for consideration. In logic, it's an <em>expression that may be true or false</em>, it can be affirmed or denied. There is the purpose of determining the validity of a claim.