Scenario Based Questions

Questions 63 through 66 use the following scenario:
Michelle plays Replenish and both players control only basic lands. When her Replenish resolves, Michelle puts into play a Crusade, an Opalescence, and an Angelic Chorus.

Angelic Chorus (3WW, Enchantment)
Whenever a creature comes into play under your control, you gain life equal to its toughness.

Crusade (WW, Enchantment)
White creatures get +1/+1.

Disenchant (1W, Instant)
Destroy target artifact or enchantment.

Opalescence (2WW, Enchantment)
Each other global enchantment is a creature with power and toughness each equal to its converted mana cost. It's still an enchantment.

Replenish (3W, Sorcery)
Return all enchantment cards from your graveyard to play. #(Local enchantments with no permanent to enchant remain in your graveyard.)#

63. How much life does Michelle gain?

a) 0
b) 7
c) 8
d) 9
e) There is no way to determine an answer with the information provided.

64. If Russell plays a Disenchant targeting Michelle's Angelic Chorus after any triggers are put on the stack, how much life does Michelle gain?

a) 0
b) 7
c) 8
d) 9
e) There is no way to determine an answer with the information provided.

65. If Russell plays a Disenchant targeting Michelle's Crusade after any triggers are put on the stack, how much life does Michelle gain?

a) 0
b) 7
c) 8
d) 9
e) There is no way to determine an answer with the information provided.

66. If Russell plays a Disenchant targeting Michelle's Opalescence after any triggers are put on the stack, how much life does Michelle gain?

a) 0
b) 7
c) 8
d) 9
e) There is no way to determine an answer with the information provided.