What grammatical signal is appropriate to complete the paragraph below?
Some teachers do not allow students to use cellphones during classes. However, using them in class
has advantages. Cellphones are useful for students in searching definitions and relevant information. They
can check pronunciations and browse pictures to fully understand concepts. Another advantage is their
of cellphones make note-taking more convenient. Students don't need to take down long notes from the
board, and can just take photos and record the teacher's discussions instead. Furthermore, it also serves as
an alternative calculator in Math subjects.
teachers view cellphones as a distraction to students,
they are still very useful. Therefore, with proper supervision and monitoring, cellphones can be very
beneficial to students during classes.
e C. As a result
A. Although
D. Furthermore
B. Because
