Task: Class Definition Understanding (ontology: Sciences/Computer_Science)

Which of the following definitions best describes 'operating system'?

A. An the concept is a piece of software which is responsible for managing software that runs on a computer and the interactions of that software with the hardware and system resources.
B. the concept is a java program which computes a series of quality control metrics for RNA-seq data. The input can be one or more BAM files. The output consists of HTML reports and tab delimited files of metrics data. This program can be valuable for comparing sequencing quality across different samples or experiments to evaluate different experimental parameters. It can also be run on individual samples as a means of quality control before continuing with downstream analysis.
C. the concept is an integrated package for the visualization and statistical analysis of DNA microarray gene expression data. It was developed by professional statisticians experienced in the analysis of microarray data and involved in the development of improved methods for the design and analysis of microarray based experiments. The system incorporates a variety of powerful analytic and visualization tools developed specifically for microarray data analysis.
D. the concept is a tool for quantifying the expression of transcripts using RNA-seq data. the concept uses new algorithms (specifically, coupling the concept of quasi-mapping with a two-phase inference procedure) to provide accurate expression estimates very quickly (i.e. wicked-fast) and while using little memory. the concept performs its inference using an expressive and realistic model of RNA-seq data that takes into account experimental attributes and biases commonly observed in real RNA-seq data.

Answer: An the concept is a piece of software which is responsible for managing software that runs on a computer and the interactions of that software with the hardware and system resources.