In the Edgeworth Box Diagram in Production with Two Goods

In the Edgeworth box diagram in production with two goods and two factors of production,

A) a movement from any point off the "production efficiency locus" ("contract curve") To any point on the locus must involve greater production of one good and less Production of the other good.
B) a movement from any point on the "production efficiency locus" ("contract curve") To any point off the locus must involve less production of both goods.
C) a point that is off the "production efficiency locus" ("contract curve") must be Associated with unemployment of at least one of the factors of production.
D) a movement from any point on the "production efficiency locus" ("contract curve") To another point on the locus must involve greater production of one good and Less production of the other good.