Astronomy quiz question: Cancer and Pyxis centered above southern horizon

Astronomy 210 Quiz 1, spring semester 2019
Cuesta College, San Luis Obispo, CA

The diagram at right shows the southern horizon as seen by an observer at 12 AM in San Luis Obispo, CA. Ignore daylight saving time. What date is this?
(A) February 1.
(B) May 1.
(C) August 1.
(D) November 1.

Correct answer (highlight to unhide): (A)

As read off from a starwheel, Cancer and Pyxis will be centered above the southern horizon at 12 AM on February 1.

(On May 1 Cancer would be just above the west horizon at 12 PM. On August 1 Cancer and Pyxis would be centered above the horizon at 12 PM. On November 1 Cancer would be just above the east horizon at 12 AM.)

Section 30674
Exam code: quiz01n1aR
(A) : 23 students
(B) : 0 students
(C) : 12 students
(D) : 0 students

Success level: 66% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 0.23

Section 30676
Exam code: quiz01sRmB
(A) : 36 students
(B) : 0 students
(C) : 4 students
(D) : 0 students

Success level: 79% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 0.50