Concept:
L.H. Morgan was an important evolutionary anthropologist who proposed stages in the development of family and marriage institutions.
According to classical evolutionary anthropology:
• Human society evolved gradually,
• Marriage forms changed over time,
• Social organization became progressively structured.
Morgan attempted to trace the historical sequence of marital evolution.
Step 1: Understanding Sexual Promiscuity.
Morgan believed the earliest stage of human relations involved:
\[
Sexual promiscuity
\]
In this stage:
• No fixed marital relations existed,
• Sexual relations were relatively unrestricted,
• Family structure was undeveloped.
Thus:
\[
B = \text{First stage}
\]
Step 2: Understanding Group Marriage.
The next stage proposed was:
\[
Group marriage
\]
In this form:
• Groups of males and females were considered marital partners,
• Individual pairing was not fixed,
• Kinship organization began developing.
Thus:
\[
D = \text{Second stage}
\]
Step 3: Understanding Polyandry.
Morgan suggested more structured marital systems emerged later, including:
\[
Polyandry
\]
Polyandry refers to:
\[
\text{One woman having multiple husbands}
\]
This represented:
• Greater regulation,
• Defined marital structure,
• More organized kinship.
Thus:
\[
A = \text{Third stage}
\]
Step 4: Understanding Monogamy.
The final and most developed stage according to Morgan was:
\[
Monogamy
\]
This involves:
• One husband,
• One wife,
• Stable family organization.
Thus:
\[
C = \text{Final stage}
\]
Step 5: Determining the correct sequence.
The correct evolutionary order becomes:
\[
B \rightarrow D \rightarrow A \rightarrow C
\]
Hence, the correct answer is:
\[
\boxed{\text{(A) B-D-A-C}}
\]