This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to serve and enjoy guinness
Choose the right glass.
Although it may seem that any glass will do, to enjoy a truly perfect glass of guinness you must use a tulip glass.
The shape of a tulip glass is perfect for allowing the nitrogen bubbles to circulate from the bottom and back up to the top.

Choose from:
(a). Ale glasses are created from the same materials as standard glasses, but the cup is positioned inside the opening of the cup. Infandel glasses would not give the same results, though they may not be instantly famed in a rhone..
(b). Evaluate your glass and determine if it will have the vessel that makes it the most suitable for your needs. Miniature flute bottled glasses are not recommended because they will not serve you accurately and you will risk condensation..
(c). Although any size will do, a 16 oz glass, otherwise known as a pint, is generally agreed upon as the classic size for the drink. Pour the drink into the glass at a 45 degree angle..
(d). A saucer of full-fat milk and an eye-glass side glass are acceptable glasses. Some people also think that this glass will be a good choice for very cold glasses because it does not allow the nitrogen bubbles to drain easily under pressure..
The answer is:
(c).