Final answer:
To make California’s government more republican and less majoritarian, ending the recall ability and eliminating ballot initiatives would likely be supported changes, as they reduce the role of direct democracy which relies on the majority vote.
Step-by-step explanation:
If you were committed to making California's government more republican (in terms of favoring representation over direct democracy) and less majoritarian (less governed by the majority), you would likely support the elimination of mechanisms that empower direct democracy.
Therefore, out of the provided choices, the most plausible change would be ending the ability of voters to recall statewide elected officials and eliminating the use of ballot initiatives, because both recall and initiatives are tools of direct democracy which give power directly to the majority of voters.
Conversely, requiring new laws to be approved by a majority vote of the public or allowing the governor and legislature to amend the state constitution without voter approval either further empower the majority (which is contrary to the goal) or risk undermining republican ideals of checks and balances, making them less desirable options.