Ehm I need help bc I’m slow :)

The meiosis is the formation of eggs and sperm. ... During meiosis , diploid cells replicate their DNA, followed by two rounds of cell division, producing four haploid sex cells.

B for me.

Its my opinion though.

Hard water is water that has a high concentration of dissolved minerals, such as calcium or magnesium. In its pure form, water does not contain hard water minerals and is naturally soft. These minerals are picked up when water passes through materials that contain calcium or magnesium, such as limestone.( think : / lol sorry if I'm wrong)