Correct : a

e correct answer is Option A - Accelerate.
All the given words - Expedite, Hasten, and Hurry - have a similar meaning. They all refer to making something happen faster or increasing the speed of an action.
Expedite means to make a process happen more quickly.
Hasten means to cause something to happen sooner.
Hurry means to act with speed.
Accelerate also means to increase the speed of something, so it matches the meaning of the given words.
Why other options are incorrect:
Option B - Retard: means to slow down or delay, which is the opposite meaning.
Option C - Provide: means to give or supply something, which is unrelated.
Option D - Disable: means to make something unable to function, which is completely different.