it can be used to help repair broken DNA, even when the break involves both strands of the double helix.
The best answer is B. <span>Photochemical smog tends to form over sunny cities. </span><span>The main components of smog are nitrogen oxides,
volatile organic compounds, peroxyacytyl nitrate and tropospheric ozone. Smog
is a mixture of air pollutants which are altered due to exposure to sunlight. </span>
Answer: i would go with A
Explanation sometimes tough love helps
