The Modular Nature of the Eve Gene's Regulatory Region Means

The modular nature of the Eve gene's regulatory region means that

A) there are seven regulatory elements and each element is sufficient for driving expression in a single stripe.
B) all the regulatory elements for each stripe use the same transcriptional activators.
C) the E.coli LacZ gene is normally only expressed in a single stripe-unlike Eve, which is expressed in seven stripes.
D) transcription regulators only bind to the stripe 2 regulatory DNA segment in stripe 2.