So the answer is (a) because in English the word is “paid” and (b) and (c) just don’t make sense the sentence states that “I (paid) the ring at the jewelry store.” I hope this helps!
Timeline on the evolution of operating systems
ENGLISH:
The plot is what happens in a story. However, a plot is not a simple sequence of events. A strong plot is centered on one moment—an interruption of a pattern, a turning point, or an action—that raises a dramatic question, which must be answered throughout the course of the story. This is also known as plot A.
ESPANOL:
La trama es lo que sucede en una historia. Sin embargo, una trama no es una simple secuencia de eventos. Una trama fuerte se centra en un momento, una interrupción de un patrón, un punto de inflexión o una acción, que plantea una pregunta dramática, que debe responderse a lo largo de la historia. Esto también se conoce como trama A.
You should probably wait for someone else because I’m not sure about the answer plz don’t get mad at me ;)