Questions & Answers about Мы выбрали наиболее короткий путь.
Выбрали is the past tense plural form of the verb выбрать (to choose / to select).
- выбрать = perfective infinitive
- выбрал = he chose
- выбрала = she chose
- выбрало = it chose
- выбрали = they chose
It agrees with мы (we), so the verb must be plural.
Also, Russian past tense is built from the infinitive stem plus endings that show gender in the singular and number in the plural.
Russian uses aspect, and here выбрать is perfective, which means the action is seen as completed.
So:
- мы выбирали = we were choosing / we used to choose / we spent time choosing
- мы выбрали = we chose / we have chosen
In this sentence, the idea is that the choice has already been made, so выбрали is the natural form.