With the exception of LSAT SuperPrep, Law Services does not publish commentary about and explanations to their questions. There are many approaches to answering LSAT questions. Law Services may be concerned that by publishing explanations, they may inadvertently promote one method of answering LSAT questions.
The LSAT preparation course industry has exploited this reality. All LSAT courses teach from actual LSAT exams. The answers to the questions are explained in the course.
In addition, some authors have published explanations to actual LSAT questions. Two examples are:
LSAT Answers: Unauthorized, Unofficial & Unsurpassed by Patrick O’Malley