Answer:
a. research products and services before buying
Step-by-step explanation:
The best way to get satisfaction and value for your dollars is by researching products and services before you buy. This is because by doing research you may find the same product or service that you want to buy with a better quality and even a better price. Both cases will add value to your money which will make you more satisfied with the purchase and give more value to the money you have and the money you are spending.
During the survey you can also assess whether the product or service you are planning to buy is really necessary and whether it is worth spending your money on it.