Multi-select problem: How does the next paragraph end?

How to predict the weather without a forecast
Detect the direction of the wind.
Wind is caused when air moves from a high pressure area to a low pressure area. Since weather moves in from the west, westerly winds indicate good weather because they suggest the bad weather is already to your east.

Select from:
a). There are a few subtle differences between air pressure and seasons. An southeast wind that is also drawn north takes a longer, slower route, whereas a east wind that is drawn east takes a longer route, but tends to wind a different way.
b). Easterly winds suggest that the bad weather is coming toward you. You can use grass or flower petals to determine the direction of the wind.
c). It is important to know what direction the wind is going before you start your calculations, because then you'll be able to think about which direction the wind will be moving in. If weather is going in the opposite direction, then you won't be able to predict the direction of wind either.
d). For air conditions in the west, it's best to keep your meridian in mind, or, if you can fly it, think of it as a wind gauge. Look for clouds and strong wind blowing toward you.
b).