Answer :
Final answer:
World War I introduced new military technologies like tanks, machine guns, mustard gas, and hand grenades.option d is correct
Explanation:
The correct answer is d) All of the above. World War I spurred significant advancements in technology across various fields, including medicine, chemistry, and weaponry. Plastic surgery emerged as a vital field to treat soldiers' disfiguring facial injuries, pioneering techniques that continue to benefit medical practice today.
Mustard gas, unfortunately, was a devastating chemical weapon used during the war, leading to research into chemical warfare and protective measures. Hand grenades saw innovation and widespread use as effective close combat weapons. These developments, born out of the exigencies of warfare, left a lasting impact on technology and society beyond the war's end.
