The cause which Watson would have MOST LIKELY supported is:
He was a politician under the People's Party and ran as a presidential candidate of America in the year 1904.
With this in mind, we can see that Tom Watson was a man who understood the plight of poor farmers and as such was a strong advocate of helping them, thus he would have agreed to lower taxes on poor farmers.
Read more about Tom Watson here:
https://brainly.com/question/14387548