Fact 1: All dogs like to run. Fact 2: Some dogs like to swim. Fact 3: Some dogs look like their masters.
If the first three statements are facts, which of the following statements must also be a fact? I. All dogs who like to swim look like their masters. II. Dogs who like to swim also like to run. III. Dogs who like to run do not look like their masters.
I. I only
II. II only
III. II and III only
IV. None of the statements is a known fact.
Question: 以下哪项是正确的？
Options:
A. 非 III
B. 以上各项均不成立
C. 非 I
D. III 或 I
E. 仅 III
Answer: A
C
True statement: II