Step 1: Understanding bilingual language acquisition.
Bilingual language acquisition refers to the ability to learn two languages simultaneously at a very early age. It typically occurs when a child is exposed to two languages from birth or during the early stages of development. This is different from learning a second language later in life, which is often called second language acquisition (SLA).
Step 2: Analyzing the options.
- (A) Correct, as it refers to the simultaneous learning of two languages from a very early age, which is a well-documented aspect of bilingual development.
- (B) Incorrect, as it refers to learning a second language after a significant age, which does not define bilingual language acquisition.
- (C) Incorrect, as it refers to acquiring a second language during the first 12 months, which does not accurately describe bilingual language acquisition.
- (D) Incorrect, as sequential acquisition involves learning languages one after the other, which is not the case in bilingual acquisition.
Step 3: Conclusion.
Thus, the correct answer is (A) Simultaneous acquisition of two languages at a very early age.