Regarding the use of test strips, which statement is correct?

a) The test strip must fill completely upon touching the blood droplet. If it doesn’t fill completely, repeat the test with the same strip.
b) If the test strip does not fill completely, do not touch the test strip to the blood droplet a second time. Discard the test strip and repeat the test with a new strip.
c) The test strip should be reused if it doesn't fill initially. d) Filling the test strip completely is not necessary.