<em><u>Answer:</u></em>
<em><u>Answer:Designing safe and effective antiviral drugs is difficult because viruses use the host's cells to replicate. This makes it difficult to find targets for the drug that would interfere with the virus without also harming the host organism's cells.</u></em>
<em><u>Answer:Designing safe and effective antiviral drugs is difficult because viruses use the host's cells to replicate. This makes it difficult to find targets for the drug that would interfere with the virus without also harming the host organism's cells.Explanation:</u></em>
<em><u>Answer:Designing safe and effective antiviral drugs is difficult because viruses use the host's cells to replicate. This makes it difficult to find targets for the drug that would interfere with the virus without also harming the host organism's cells.Explanation:hope this help you.........</u></em>
First one is C, second one is B, third one is C
<span>Most sandstone is composed of quartz or feldspar </span>