The provided question is incomplete as it lacks the appropriate option that are necessary the for the answer, however the correct answer are as follows:
A) a family member with multiple cancers
B) presence of a disease in family members with poor health habits
C) appearance of a disease in one family member
D) onset of a disease at a late age
Answer:
The correct answer is - option A.
Step-by-step explanation:
Genetically linked diseases are the diseases that are passed from one generation to the other. It is generally occur due to the mutation or genetic level error . In a family health tree if a disease found to be genetically linked it will most probably occur in the next generation.
In the given option the only option that might have a genetic link within a family health tree and that is multiple cancers as it is related to the gene level and might transfer generation in family.
Thus, the correct answer is - option A.