Final answer:
(a) The Landrum-Griffin Act is the legislation that safeguards union member rights and prevents unscrupulous practices by employers and union officials.
Step-by-step explanation:
The act that safeguards union member rights and prevents unscrupulous practices by both employer and union officials is the Landrum-Griffin Act, which is also known as the Labor-Management Reporting and Disclosure Act of 1959. This act aimed to protect union members from potential wrongdoing by their unions, mandating democratic processes within unions and requiring financial disclosures by unions.
The Wagner Act, on the other hand, commonly referred to as the National Labor Relations Act of 1935, was legislation that primarily focused on protecting the rights of workers to create unions and bargain collectively with employers. It also established the National Labor Relations Board (NLRB) to enforce its provisions and oversee fair labor practices.