Step 1: Standard carnations bear one large flower per disbudded stem; spray types bear several small flowers per stem.
Step 2: 'Cherry Bag' (B) and 'Pink Beam' (D) are catalogued as spray-type cultivars, so they are excluded.
Step 3: 'Lavender Lace' (A) and 'White Giant' (C) are catalogued as standard, single-bloom cultivars.
Step 4: Correct option: \( \boxed{\text{(A) and (C) only}} \).