Final answer:
Discrimination against women can manifest in various ways in a society. However, females making up less than 50% of the population is not a direct indicator of discrimination against women.
Step-by-step explanation:
Discrimination against women can manifest in various ways in a society. However, in the given options, the indicator that is not directly related to discrimination against women is A. Females make up less than 50% of the population. This may not necessarily indicate discrimination as gender ratios can be influenced by various factors such as birth rates, migration, or war casualties.
On the other hand, options B, C, and D are more closely associated with discriminatory practices against women. Low female employment rates (B) indicate limited opportunities and unequal treatment in the workforce. Women first marrying in their 20s (C) can reflect societal norms that restrict women's autonomy, education, and career opportunities. High female infanticide rates (D) point to a severe bias against female children and a devaluation of women's lives.