Alina is revising her research paper about online classes to be sure she is citing her sources correctly. Alina is using MLA style for her in-text citations. Which sentence should she revise?

The widespread use of technology (including computers and smartphones) have led to a wide variety of online course opportunities (“Benefits of Digital Learning”).

Online classes can really support “students who struggle to build positive relationships with teachers, need to recover failed credits, or have a work schedule that makes attending traditional school hours difficult” (Deleon, Desiree).

Students can also “participate in unique courses that may not be offered at their own school, such as language or business classes” (Deleon).

In an online class, “Emails and discussion board posts are utilized in place of in-person discussions” (Rhodes).