Answer:
The revision likely helped producers in the United States, because they no longer had to comply with the expensive regulation.
Explanation:
Apex
Could you post a photo of the graph?
Answer:
Coronaviruses are named for the crown-like spikes on their surface. There are four main sub-groupings of coronaviruses, known as alpha, beta, gamma, and delta.
Human coronaviruses were first identified in the mid-1960s. The seven coronaviruses that can infect people are:
Common human coronaviruses
229E (alpha coronavirus)
NL63 (alpha coronavirus)
OC43 (beta coronavirus)
HKU1 (beta coronavirus)
Other human
I am almost positive that the answer is A. freezing