Answer:
semiconductors
Step-by-step explanation:
Semiconductors gave birth to the electronics industry. There was shift from Industrial revolution to information technology in America. This evolution in technology brought about modernization in communication, information and brought about social change. Option A is correct.
Penicillin was the first true antibiotic and it was hailed as the miracle which revolutionized medical science. Option B is incorrect.
AIDS treatment was a big breakthrough in medical sciences. Option C is incorrect.
Gene discovery in fruit lies was a big breakthrough in biotechnology.Option D is incorrect.