The correct answer is B. Matthew plans to cut the grass today
Explanation:
The mood in language refers to the way words are used to express a fact, possibility, question, order, condition or wish. In the case of the indicative mood, this mood is used to express a reality or facts which means an indicative sentence is one that mainly describes something that really happens which is different from an order or command, a question, a wish or possibility. Considering this, the way to write the interrogative sentence "Will you please cut the grass today, Matthew?" in an indicative mood is "Matthew plans to cut the grass today" as this sentence express reality and is related to the original interrogative sentence. Other options are not possible as they are in imperative mood (order or command), subjunctive mood (wish or possibility) or conditional mood (some action depends on other action).