Probably D. Hope this helps!
Alejandro estudia para el examen.
The correct answer is the second one.
Spanish verbs have suffixes for each of the pronouns, just like English does (only for the third person singular). So, this is how you conjugate the verb estudiar in Spanish:
1. yo estudio 1. nosotros estudiamos
2. tu estudias 2. vosotros <span>estudiáis
3. el/ella/Usted estudia 3. Ellos/ellas/Ustedes estudian</span>
Answer:
They faced rivers, rough terrain,and mountains. How were the railroad and steel industries interrelated? Because the railroad needs steel track provided by the boom of the steel industry.
Explanation: