Centrioles is only found in animal cells but not in plant cells.
The best way of doing it without potentially causing harm to yourself, would be "wafting".
The number of chromosomes will be haploid as opposed to diploid so you will end up with 5 chromosomes
A makes the most sense, though D could actually be an Ok reason, the other two aren't reasonable, a fire safety action? The door would be better open in a fire emergancy, it makes a quicker escape