Concept:A valid Islamic marriage requires specific conditions, and the presence of witnesses is one of the essential requirements.
Explanation:According to the Qur'an and Islamic teachings, a marriage is only valid when at least two witnesses are present.
The witnesses must be of sound character and must hear the marriage proposal and acceptance.
Their presence makes the marriage publicly known and legally recognised within the community.
The other options, such as slaughtering an animal, wearing a marriage garment, or deciding on a place of residence, are not conditions for the validity of the marriage.
These acts may be cultural practices or later arrangements, but they are not required by Islamic law.
Therefore, the marriage contract cannot be considered valid without two witnesses.
Answer:A. At least two witnesses