Fill in the blank given below using the correct idiom. After studying all night, John managed to _______________ by completing his project and preparing for the presentation simultaneously.

The idiom "kill two birds with one stone" means to achieve two objectives or complete two tasks with a single action. (A) push his luck: To take a risk by relying on good fortune that might not continue. (B) reap the harvest: To enjoy the results of one's efforts, especially over time. (C) roll up his sleeves: To get ready to work, especially on a task that requires effort. (D) see eye to eye: To agree with someone; to have the same viewpoint. (E) kill two birds with one stone: Achieve two objectives or complete two tasks with a single action.