Imo D.. even though I know what the OA is..
I don't think we can assume that there are more ppl who bought properties at lower rate that those who buy properties at higher rate..
All the cases in the argument are hypothetical.
(A) Proposition 13 is unconstitutional because it imposes an unequal tax on properties of equal value.
=> We can't assume author's position from the argument.
(B) If Proposition 13 is repealed, every homeowner
is likely to experience a substantial increase in property taxes.
=> Only if every homeowners bought those properties at lower rate. What if there are more ppl. who buy properties
If it says "If Proposition 13 is repealed, there will be a substantial increase in property taxes. I would choose B.
(C) By preventing inflation from driving up property values, Proposition 13 has saved homeowners thousands of dollars in property taxes.
=> Well, If B is the one.. this one has equal value as B.
(D) If Proposition 13 is not repealed, identical properties will continue to be taxed at different rates.
=> With Proposition 13, true.. but might be an answer for inference question.
(E) Proposition 13 has benefited some homeowners more than others.
=> We don't know which is which..
However, we are being asked "Which of the following is the conclusion for which the author most likely is arguing in the passage above?"... does this type of question need particular approach??
Assumption => Most ppl bought properties at lower value..and those propeties' value is going up..
Then, answer should be B
The only thing that matters is what you believe.