题目选项分析

In the past, traditional, 2-D films made by Hollywood studios have been considered more lucrative than 3-D films. Nevertheless, a recent study has found that the most popular films from the past year used 3-D techniques significantly more than less popular films did. This confirms the view that 3-D films have become more lucrative than traditional, 2-D films.

The conclusion above is based on which of the following assumptions?

【选项】Films shot in 2-D could be made as easily by using 3-D technologies.