Oil industry lobby groups have been able to strongly influence the texas railroad commission's three commissioners instead of having to influence the governor is an example of how can increase interest group strength.

It is an example of how unity among the lobby groups can increase interest group strength.

Explanation:

Many lobby groups were and are still functional historically in Texas that have repetitively influenced the people in power to have major administrative decisions made in their favor. One such interest group has been of oil industry owners who have always exhibited unity among themselves. In most cases, the unity that they display has been the reason for changing many crucial decisions regarding oil production and sale of oil. For example, the interest group has always played an important role in the determination of tax rates in the state related to oil.