Which blood type can be transfused into a patient who has blood type a–?

For a person with blood type A- (A negative),  they can be transfused with either  blood type A negative  , or blood type O negative.

This is because any other blood type will immediately be rejected by their body.

A person with blood type A negative has got antibodies against any other blood type which has a rhesus positive factor as well as antibodies against  any other blood type of a different group such as B and AB, even if they are  rhesus negative.

Therefore because of the rhesus negative factor, a person with blood type A negative  can only be transfused with rhesus negative .

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

hello

answer: collecting information/data

reason: the student is going around and asking people questions to collect data

i hope this