Question 18

Allison and Honjo began their most recent collaborative research in the 2000s.

Their collaborative research efforts converged in the 2000s, leading to significant advancements in cancer immunotherapy.

A) 1970s

This option is incorrect as the extract indicates that both Allison and Honjo began their individual research efforts in earlier decades, but their most recent collaboration did not start until the 2000s.

B) 1990s

While both researchers were active in their respective fields during the 1990s, this option does not accurately reflect the timeframe of their recent collaborative research, which began in the 2000s.

C) 2000s

This is the correct answer. The extract clearly states that by the 2000s, Allison and Honjo's efforts had converged, marking the commencement of their most recent collaborative research in cancer immunotherapy.

D) 1980s

This option is incorrect as there is no mention of significant collaborative research between Allison and Honjo occurring in the 1980s. Their notable collaboration began in the 2000s.

Conclusion

The correct answer, the 2000s, is definitively supported by the extract, which emphasizes that it was during this decade that Allison and Honjo's research efforts converged. All other options are incorrect as they do not align with the timeline of their collaborative research as presented in the context.