Which plate tectonic events occurred as the Iapetus Ocean closed? A) Taconian orogeny and Grenville orogeny B) Taconian orogeny and Acadian orogeny C) Alleghenian orogeny and Acadian orogeny D) Alleghenian orogeny and Grenville orogeny

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.

answer: 45

explanationyou have to add as well to be it could be

answer: accepted answer: aquatic animals use the oxygen dissolved in water to carry out respiration. since the amount of dissolved oxygen in water is low as compared to the amount of oxygen in the air, therefore the rate of breathing in aquatic animals is much faster than it is in terrestrial animals.

explanation: