Question

what is the meaning of the word repudiates as used in the passage?
in his latest paper, dr. anderson clearly repudiates dr. mcknights competing claim about the age of several egyptian artifacts. as he rejects mcknights hypothesis, anderson cites extensive radiocarbon dating and careful analysis of the pigments and designs used to decorate the pottery shards. in view of andersons findings, archaeologists have decided to update their estimates about the artifacts age.
updates or replaces
disparages or ridicules
refutes or dismisses

Explanation:

En el contexto del texto, "repudiates" se refiere a que Dr. Anderson rechaza o desmiente la hipótesis de Dr. McKnight. La frase "As he rejects McKnight's hypothesis" es una pista clave. "Updates or replaces" no coincide con el significado de rechazar. "Disparages or ridicules" implica menos una refutación basada en evidencia (como la radiocarbon dating y el análisis de pigmentos y diseños) y más un desprecio o burla. "Refutes or dismisses" coincide con el uso del verbo "rejects" en el texto y el hecho de que se presenten evidencia para desmentir la hipótesis.

Answer:

refutes or dismisses