Redundancy is important because A.) Safety is increased
B.) Some aviation systems have a relatively high failure rate
C.) More than one system should be available for critical flight
D.) All of the above

this is true

explanation:

i looked it up

answer:

rawr

explanation:

hes mad if he says,

explanation:

r!

answer: excel provides a method to add or to remove borders around and between cells. instead of selecting cells first and then formatting, you can choose the formatting tool that you want to use, and then apply the format to one or more cells.

explanation: plz brainliest,im 1 more brainliest from ranking up< hop icould