Answer:
b. speed money
Explanation:
Speed money -
It refers to the amount of money provided in order to increases the time period of any process or task , is referred to as speed money .
It is also known as grease payments .
It is different from the bribe , as bribe is given in order to approve the activity or task .
But speed money is used to hasten the time period .
Hence , from the given question ,
The correct answer is speed money .