Final answer:
The phrases 'true to form' and 'at this moment' are clichés, known for being overused expressions. The word that is closest in meaning to 'hypothesis' is 'suggestion', as a hypothesis is an unconfirmed explanation open to further research.
Step-by-step explanation:
The phrases true to form and at this moment are examples of clichés. Clichés are expressions that have become overused to the point that they have lost their original meaning or effect. They are often criticized for being unoriginal or a sign of lazy writing. When answering the multiple-choice question to find the closest meaning to hypothesis, the appropriate selection would be d. suggestion. A hypothesis is a proposed explanation made on the basis of limited evidence as a starting point for further investigation. It is not yet confirmed and is subject to experimentation and further research, which aligns with the idea of a suggestion more than a fact, law, formula, or conclusion.