Sociometry is a quantitative method used to measure social relationships. Let's analyze each statement provided in the options to determine which ones are true regarding sociometry.

1. (A) A method for depicting and measuring interpersonal attraction in groups.

This statement is true. Sociometry is indeed used to depict and measure interpersonal attractions and relationships within a group, analyzing how individuals relate to each other.

1. (B) By this method, attraction and repulsion of members of a group can be represented by sociograms.

This statement is true. Sociograms are graphical representations used in sociometry to map out social connections that illustrate attraction and repulsion within group members.

1. (C) Role enactment of individuals in a group are done.

This statement is false. Sociometry focuses on measuring relationships, not enacting roles. Role enactment involves role-playing, which is not a part of sociometric measurement.

1. (D) Concepts of leadership and isolation can be investigated by this method.

This statement is true. Sociometry can be used to explore concepts like leadership, isolation, or popularity within a group because it shows who is chosen or rejected by peers.

1. (E) The method is eminently an interdisciplinary investigation of group relations.

This statement is true. Sociometry is interdisciplinary as it combines elements from psychology, sociology, and other fields to study group dynamics.

Thus, the correct statements are (A), (B), (D), and (E). Therefore, the correct answer is: