Please correct me....
I have different understanding
"represents the smallest portion that still looks and feels "substantial" enough to appeal to dieters who lack the self control to limit their consumption of snacks from larger packages."
It clearly states that dieters want to go for small packs and limit consumption of larger ones.
D.) small packs are not sold as high as large ones, if both are placed together. This donot undermine the explanation of quoted text as dieters
...
I have different understanding
"represents the smallest portion that still looks and feels "substantial" enough to appeal to dieters who lack the self control to limit their consumption of snacks from larger packages."
It clearly states that dieters want to go for small packs and limit consumption of larger ones.
D.) small packs are not sold as high as large ones, if both are placed together. This donot undermine the explanation of quoted text as dieters
...