A Leased a Parcel of Land from B

A leased a parcel of land from B. With B's consent, A put up a manufacturing business on the property and attached a machinery. What is the nature of the machinery?

A) The machinery is always a movable property.
B) The machinery is now immovable by destination.
C) The machinery can be considered immovable if there is a provision in the contract of lease that the same will become B's property when the contract will expire.
D) The parties cannot change the nature of the property even by agreement.