To put one’s hand to plough means:

A. To stop the conversation
B. To handle the situation
C. To take a difficult task 
D. To give up task

🧠 Explanation:

“To put one’s hand to plough” means to take a difficult task, implying commitment and effort. “Means” is a verb; “task” is a noun. Alternatives like “undertake” or “engage in” exist. Idiomatic expressions enhance language comprehension and communication skills.