Technician A says that rosin-core solder should be used for electrical connections. Technician B states that a crimp and shrink connector can be used for repairs. Who is correct?

Using rosin-core solder for electrical connections is indeed a common and effective practice, as it provides a reliable and conductive bond. Rosin-core solder contains a flux material that helps clean the surfaces being soldered, ensuring better adhesion and reducing the risk of oxidation. This is particularly important in electrical applications where conductivity and longevity of the connection are crucial.

On the other hand, crimp and shrink connectors are also valid methods for making electrical connections, as they provide a quick and often more reliable means of joining wires without the need for soldering. While Technician B's statement is accurate regarding the use of crimp and shrink connectors, the question asks for who is correct in providing the best option for electrical connections, which lies with the use of rosin-core solder as a traditional method.

Thus, the focus of the question makes Technician A's assertion about the use of rosin-core solder the correct choice in this context.