Which of these would be the most effective at destroying giardia, a protozoan that infects the intestinal tract?

The right answer is an antiparasitic drug (like metronidazole).

Giardiasis is an intestinal infection caused by Giardia lamblia, a microscopic unicellular parasite.

The parasite that causes giardiasis is lodged in the intestines of humans and infected animals.

In some cases, giardiasis disappears spontaneously in about 1 month. Other people need to take antiparasitic drugs (eg, metronidazole) to shorten the duration of the infection and kill the parasite.

answer; the correct answer is conflict- related aggression; +

instead of copying and pasting things off of tests or work done on computer which im sure you did, try and read over the question carefully