Answer : B.) pude
Entire sentence : Yo pude ganar el partido de tenis.
Translation: I was able to win the tennis match.
Explanation: This sentence is in the past, and happened only once, so the correct verb form is the preterite, and as the subject in this sentence is "Yo", which is the first singular person, the verb must agree in this form. Yo pude.
[tex]\textit{\textbf{Spymore}}[/tex]