Maybe D? nothing matters and schools not important but i think D
Answer:
46 billion light-years (14 billion parsecs), making the diameter of the observable universe about 93 billion light-years (28 billion parsecs).
Explanation:
Logic...
The construction of dams in lower reaches involves more submergence of usually cultivated land per unit of storage due to the flat nature of the topography. Advocates of small dams stress that the cost per ha of potential irrigation of tank projects is much lower than for large irrigation projects.
Is that maths because it looks likes maths