Answer:
B : puffing
Explanation:
Jake's promise is an example of Puffing which refers to usually an expression which is made by a salesman that involves the status of goods proposed for sale. It offers opinions rather than realities and is normally not regarded as a legally binding promise as here Jake promises Sam that his motorbike is capable of providing a mileage of 70 miles to sell his bike to Sam but Jake is not legally bound for his promise.