A botanist scrapes pollen off a flower of one plant and then uses it to pollinate the flower of another plant. what can be scientifically concluded about their offerings ​

As a botanist scraped pollen off from a flower of one plant and pollinates the flower of another plant it shows that the botanist helped in the sexual reproduction of plants.

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.