In female cockroaches,the brood or genital pouch is formed by which abdominal segments?

• A
  $8^{th}$ and $9^{th}$ terga dorsally and $8^{th}$ sternum ventrally
• B
  $8^{th}$ tergum dorsally and $8^{th}$ sternum ventrally
• C
  $9^{th}$ tergum dorsally and $9^{th}$ and $10^{th}$ sterna ventrally
• D
  $9^{th}$ and $10^{th}$ terga dorsally and $9^{th}$ sternum ventrally