D is only slightly
. The statement is meant to imply the Host is still contains traces of ordinary bread and the cup, traces of ordinary wine. Christ is "Really present" within
the remaining bread and wine. Catholics believe the bread and wine are totally transformed to the Body and Blood of Christ! Its a subtle difference, and I wouldn't blame anyone for missing it
Catholics Christ can't be divided into "pieces". A body without blood is dead. Blood sustains the body, and the body gives blood purpose. Without a body, what good blood
Christ's is alive
The Church does indeed limit reception to the Host in some circumstances such as large crowds, so as to avoid handling large amounts of the consecrated wine (too easy to spill!).
Some parishioners felt they were being denied the full graces of the Eucharist, so the Catholic Church prohibited generally distributing under both species to emphasize our teaching that Christ's Body and Blood are equally present in both species.
It was a matter of catechism and practicality! This practice however has been discontinued, and parishes are encouraged to offer under both species once more.
(Incidentally, during the Catholic Mass, when the priest self communes, he the Church teaches the he symbolically reunites the Body and Blood within his person to emphasize Christ's resurrection, but the Body and Blood are, in Catholic teaching, equally present in both species as soon as they are consecrated.
I went to a mass celebrated in Spanish this way. It did look quite reverent - though the priest stopped before we got a chance to commune! We were quite baffled, lol.