In a Registration Database,Ross Has Tables for Student,professor,classroom,class,class-Hour

Multiple Choice

In a registration database,Ross has tables for student,professor,classroom,class,class-hour.Since his campus has about 12,000 students,when he runs queries about what student is in what class,taught by what professor in what classroom at which hour,the DBMS software will have to perform many _________

A) Axes
B) Parallels
C) Concretes
D) Joins
E) Enrolls