Which of the following statements are correct?
a. texas’s "basic speed law" says that you must never drive faster than is safe for the conditions, no matter what the speed limit sign may say
b. no matter what the speed limit sign may say, your speed should depend on the amount of rain, fog, snow, ice, wind, or dust
c. texas’s "basic speed law" says that you are allowed to drive what the speed limit says, no matter what the conditions on roads are
d. a and b