Answer:
i think it's D
Explanation:
my bad if u get it wrong or anything
Nitrogen and Oxygen make up the greatest percentage of the atmosphere.
Hope I helped love! <3
My teacher always taught me the saying "(A)pples on (T)rees, (C)ars in (G)arrages, meaning that A always went with T and C always goes with G
When that applies here, 30 Red, or Adenine legos would go with 30 Thymine legos, which is the color orange
30 reds would go with 30 oranges in this case