Researching and redoing previous experiments will not test a new hypothesis. Option A.
Arnaldo's plan is flawed because it primarily involves researching and recreating established experiments by Heisenberg and Bohr.
Testing a new hypothesis requires designing and conducting novel experiments specifically tailored to address the unique aspects of Arnaldo's hypothesis.
Merely replicating existing experiments won't challenge or validate his innovative ideas. Scientific inquiry involves formulating new experiments, collecting original data, and analyzing results to either support or refute a hypothesis.
Arnaldo needs to design experiments that directly address his hypothesis about electrons, ensuring a rigorous and unbiased assessment of its validity in the context of known principles.