When a child reaches adolescence, there is apt to be a conflict between the parents and the child, since the latter considers himself to be by now quite capable of managing his own affairs, while the former are filled with parental solicitude, which is often a disguise for love of power. Parents consider, usually, that the various moral problems which arise in adolescence are peculiarly their province. The options they express, however, are so dogmatic that the young seldom confide in them, and usually go their own way in secret.
Based on the above passage, the following assumptions have been made:

Correct Option (1)

Assumption 1 is valid. The passage states that parental solicitude is "often a disguise for love of power," indicating a tendency towards dominance. Furthermore, it mentions that parents' expressed opinions are "dogmatic," leading adolescents to "seldom confide in them" and "usually go their own way in secret." This directly supports the inference that adolescents feel uncomfortable due to their parents' dominating and assertive nature.

Incorrect Options:

Assumption 2 is not valid. The passage describes conflict, parental dogmatism, and adolescents' tendency to keep matters secret. However, it does not provide any information to suggest that adolescents lack respect for their parents. The conflict arises from differing views on managing affairs and parental assertiveness, not from a general disrespect. The phrase "modern times" is also not referenced in the passage.

Therefore:

• Option 2 is incorrect because Assumption 2 is not supported by the passage.
• Option 3 is incorrect because Assumption 2 is invalid.
• Option 4 is incorrect because Assumption 1 is valid.