Select all sentences in which the past tenses match the stated sequence or timing.
While the radio was playing, rain was tapping against the windows.✓Bonne réponse
I was fastening the trailer when the hitch was snapping.
The runner crossed the line, waved to the crowd and hugged her coach.✓Bonne réponse
At 20:15, both musicians were in the middle of the same performance: one played the violin and the other was keeping the rhythm.
Explication
The radio and rain activities are correctly simultaneous, and the runner's three verbs correctly form a completed sequence. The other sentences either make the interruption continuous or use a simple form for one of two explicitly ongoing actions.