Question

multiple select question select all that apply which of the following help scientists reduce bias? presenting only data that supports their hypothesis running as many trials as possible keeping accurate notes of each observation selecting results from only some of the trials

Explanation:

Presenting only data that supports a hypothesis and selecting results from only some trials introduce bias. Running many trials increases the sample size and objectivity, and keeping accurate notes helps in an unbiased record - keeping and analysis.

Answer:

B. running as many trials as possible
C. keeping accurate notes of each observation